Hub of a joint for a power transmission



FIG. 1 is a front perspective view of a hub of a joint for a power transmission showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof, the rear view being a mirror image of FIG. 3;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof; and,

FIG. 7 is a left side elevational view thereof. 

The ornamental design for a hub of a joint for a power transmission, as shown and described. 